A car is travelling alonna highway with a speed of 2.5 m/s when the driver notices an obstruction 1.80 x 10^2m directly ahead. It takes the driver 0.80 sec to react and being braking.
a) How far does the car travel before it begins to slow down?
b) How long will it take the car to stop once the brakes are applied, provided the car stops just before the obstruction?